Anatomie.  — De  Heer  Boeke  biedt  een  uiededeeling  aan  van  den 
Heer  Erik  Agüuhr:  ,,Are  the  cross-striated  inuscle  fibres  of 
the  extreniities  (dso  iii/ieronted  sympatkeiicalbj?” 
(Mede  aangeboden  door  den  Heer  Sluiter). 
In  the  Anatoinischer  Anzeiger,  Bd.  44  Boeke  ')  gives  an  account  of 
how  lie  has  shown  morpliologicallj  that  tlie  cross-striated  inuscle 
tibres  in  the  ni.  obliquus  ocnli  superior  of  the  cat  are  innervated  not 
oidy  by  cerebral  but  also  by  sympathetic  nerves.  He  describes 
how  he  made  a section  of  the  n.  trochlearis  near  the  basis  of  the  brain 
and  let  the  animal  live  till  the  nerve  tibres,  that  had  been  cut  otf, 
peripherically  of  the  place  where  the  sections  were  made,  had  under- 
gone  degeneration  that  could  be  proved  morphologically.  He  also 
found  in  BiELscHOWSKY-impregnated  sections  fVom  the  m.  obliquus 
oculi  of  the  animal  that  the  medullated  nerves  had  undergone  dege- 
neration. By  the  side  of  these  degenerated  cerebral  nerves  Boeke 
found,  however,  intact  nerves  free  from  mednllary  sheaths,  which 
ended  in  terminal  loops  in  or  on  the  muscle  fibres. 
Boeke  was  able  to  show  that  the  terminal  loops  had  a hypo-lemmal 
position  and  on  account  of  this  he  is  of  the  opinion,  that  the  intact 
nerves  are  of  an  efferent  nature.  The  position  on  the  muscle  fibres 
of  the  terminal  loops  of  these  nerves  was  partly  inside  and  partly 
outside  the  region  of  a motor  plate.  In  this  way  Boeke  had  of  course 
put  forward  evidence  of  the  innervation  of  the  cross-striated  mnscle 
tibres  by  sympathetic  nerves  as  well. 
This  morphological  e\'idence  of  Boeke  has  caused  me  to  investi- 
gate  the  occurrence  of  such  nerves  in  the  mnsculature  of  the  extre- 
mities.  It  is  well  known,  that  the  inner  orbital  muscles  are  excee- 
dingly  well  snpplied  with  nerves,  and  the  possibility  that  only  these 
and  110  other  cross-striated  muscles  are  innervated  sympathetically 
is  of  course  quite  a reasonable  one,  even  though  it  is  not  obvions. 
Dnring  my  investigations  on  the  plurisegmental  innervation  of  the 
separate  cross-striated  muscle  fibres  I had  in  addition  observed  in 
the  muscles  of  the  extremity  a number  of  terminal  organs  of  nerves, 
which  I conld  not  iiiterprete  with  certainty.  I had  also  noticed  a 
‘)  Boëke,  J.  Die  doppelte  (motorische  imd  sympathische)  et'ferente  Innervation  der 
quergestreiften  Muskelfasern.  Anat.  Anz.,  Bd.  44,  1913. 
